Method of making hot producer-gas.



, E. FLEISCHER. MBTHDD 0F MAKING HOT PRODUCER GAS., APPLIoATIoN FILED 0012.26, 1910.

1,041,058. Patented lout. 15, 1912.

EMIL FLEISCHER, OF DRESDEN-ALTSTADT, GERMANY.

METHOD 0F MAKING HOT PRODUCER-GAS.

Specification o1 Letters Patent.

Application filed October 26, 1910.

Serial No. 589,178.

To all whom fit may concern:

Be it known that l, lliiiiiA Lnisoiinn, .a subject of the German Emperor, and reen dent of D1'esdei1-Altstadt, in the Kingdom of Saxony, Germany, (with the post-otlice address 'liergartenstrasse 32,) have invented new and useful Improvements in Methods of Making Hot l )roducer-Gas, of which the following is a specification.

This invention relates to the manufacture of very hot carbon monoxid gas whichcan be used for the production of hydrogen and many other industrial purposes as hereinafter set forth. i

The ordinary' producers. particularly 'those for regenerative heating, deliver gas for further use at a temperature o'f lOO to 500O ceiitigradc. This limits their applicability and in all applications which reH quire higher 'temporalures precautions must be taken for supplying additional heat, most generally by highly heating the air used for firing.

In the new producer constructed according; to this invention carbon inoiioaid is pro-- duced having a temperature of 1000 centigrade or higher. llereby, entirely new applications become possible; for instance ther gas may be used ter processes oi reduction and oxidation which occur or are profitable only at high. temperatures. Obviously it is i'iecessary that the producer shouldf be 'ted with such fuel and should be consti-actin] on such principles will result, in the profita;- tion of the greatest possible amount oit heat therein.

For the production ot' hot gas, however, the inode ot operatingV hitherto usual by which the gas issues only at one place in the producer inadmissible. Another nyehod must be adopted and this method is based .in the new observations which I have made. If the gas which is produced by the combustion of carbon to carbon inonoxid is to leave the producer having' the temperature of coinbustion, it. is essential, in order that subs(L queiitly descending cooler combustible should not cool the gas, that a quantity of carbon equal to that which is burnt should be simultaneously heated as far as possible tothe temperature o'l combustion. This is. however, vonly possible by causingr a part ot' the hot producer gas to traverse the whole column of 'fuel in order to pre-heat this, While the larger part ol the hot `iras. leaves vessentially cooler conditionner one insures that; that part of the column A the producer at the zone et the white hot through vpart of the white het fuel and their leaves the producer with the high temperature which it possesses while the rest of the 1 producer gas (10 to 20% may suffice) traverses the whole column of fuel and leavestlie4 producer through a controlling valve in an 1n this manof fuel which is above the outlet for thehot gas is thoroughly pre-heated so that the fuel always remains very hot at the saidoutlet for the hot gas. h/l'oreoverby heating the blast ol' air, :tor instance by combustion ot the cooler part of the gas, to 400 to 500C' cen-A tigradc it is possible to produce a gas Whose Patented Oct. 15, 1912.

temperature exceeds le-00 centigrade. The f inducing gas thus possesses in addition tio-its chemical activity a very considerable amount of heat so that it can be used for a great va? riety of chemical and metallurgical pur" poses. For instance by using such hot gas as a reducing agent and as the heating agent, j, hydrogen can be made very cheaply without retorts in accordance with the following method.

lt is known that iron oxid isreduced by reducing gases to iron sponge and that bv subsequently leading' steam over this finely sub-divided metallic iron the latter is reeonvertcd into an cxid of iron with liberation ot hydrogen. The fulfilment of this redaction of iron oizid is, however, connected with a temperature oi" at least (350 centlgrade when carbon nionoxid or reduciin,n1 rases containingr carbon inonoxid are used. For thisI reason the reduction of iron oxid has hitherto been conducted in vessels, such as tubes or retorts, which are heated Wholly, l externally and the reducing gas has been led through the red hot iron oxid in these heated vessels.

By use ot the newV very hot producer gas external heating ot the vessel in which. the reduction of ii-ou oxid is conducted is no longer necessary uml the reduction can be carried out in a cupola tilled wit-h iron oxid, rlhis cupola or blast. iurnace, which i's lined with fire-pr0ot material, is connected with the producer by a` short pipe adapted to be closed by a valve throughwhich the hot producer gas 'passes to enter the furnace to 

